Despite their underwater habitat, whales are mammals. Mammals are not solely terrestrial; some, including whales and dolphins, are fully aquatic the University of Michigan Museum of Zoology reports.

Millions of years of isolation have shaped Australia's extraordinary mammal fauna into species unlike anywhere else in the ...

Discover more about the egg-laying monotremes of Oceania and the ancient traits they still carry.

Add Yahoo as a preferred source to see more of our stories on Google. Despite their underwater habitat, whales are mammals. Mammals are not solely terrestrial; some, including whales and dolphins, are ...